ūrdhva-mūlam adhaḥ-śākham
aśvatthaḿ prāhur avyayam
chandāḿsi yasya parṇāni
yas taḿ veda sa veda-vit
Translation
The Supreme Personality of Godhead said: It is said that there is an imperishable banyan tree that has its roots upward and its branches down and whose leaves are the Vedic hymns. One who knows this tree is the knower of the Vedas.